Panasonic Cs Kexxnb4x Cz 18bt1u Service Manual

TECHNICAL & SERVICE MANUAL
CS-KE12NB41 & CZ-18BT1U + CU-KE12NK1
CS-KE18NB4UW & CZ-18BT1U + CU-KE18NKU
DC INVERTER SPLIT SYSTEM AIR CONDITIONER
Indoor Unit
Outdoor Model No. Product Code No.
1 852 361 17
1 852 361 20
Outdoor Unit
CS-KE12NB41 (Body) & CZ-18BT1U (Panel)
CS-KE18NB4UW (Body) & CZ-18BT1U (Panel)
Remote Controller
Wired Remote Controller
(Option)
CU-KE12NK1
CU-KE18NKU
REFERENCE NO. SM700880
Indoor Model No.
Body (Panel)Product Code No.
Body (Panel)
1 852 361 05 (1 852 361 15)
1 852 361 07 (1...

•  Before doing repair work, please read the "     SAFETY PRECAUTIONS" carefully and fully understand them. 
•  The precautionary items here are divided into "     Warning" and "     Caution" items. 
Items in particular which may cause death or serious injury to the service personnel if the work is not performed correctly, 
are included in the "     Warning" table.
However, even precautionary items identified as "     Caution" also have the potential for serious...

Warning
If refrigerant gas blows off during the work, do not touch the refrigerant gas as it may cause frostbite.
If refrigerant gas leaks during the work, ventilate the room.
If refrigerant gas catches fire, harmful gas may be generated.
Do not mix any gas other than the specified refrigerant gas in the refrigerating cycle. 
If air or other contaminants mix with the gas, pressure will become extremely high in the refrigerating cycle, 
which may cause a unit breakdown."
When the welded section of the...

Table of Contents
    SAFETY PRECAUTIONS
TABLE OF CONTENTS
1.   OPERATING RANGE
2.   SPECIFICATIONS
2-1. Unit Specifications 
2-2.  Major Component Specifications 
2-3.  Other Component Specifications 
3.   DIMENSIONAL DATA
4.   REFRIGERANT FLOW DIAGRAM
4-1. Refrigerant Flow Diagram
5.   PERFORMANCE DATA
5-1. Temperature Charts
5-2. Cooling Capacity
5-3.  Cooling Capacity (Low Ambient)
5-4. Heating Capacity
6.   ELECTRICAL DATA
6-1.   Electrical Characteristics
6-2.   Electric Wiring Diagrams
7....

10. CHECKING ELECTRICAL COMPONENTS
10-1.  Measurement of Insulation Resistance
10-2.  Checking Continuity of Fuse on PCB Ass'y
11. REFRIGERANT R410A: 
SPECIAL PRECAUTIONS WHEN SERVICING UNIT
11-1.  Characteristics of New Refrigerant R410A
11-2.  Checklist before Servicing
11-3.  Tools Specifically for R410A
11-4.  Tubing Installation Procedures
11-5.  In Case of Compressor Malfunction
11-6.  In Case Refrigerant is Leaking
11-7.  Charging Additional Refrigerant
11-8.  Retro-Fitting Existing Systems...

95 °F DB / 71 °F WB
67 °F DB / 57 °F WB
80 °F DB / 67 °F WB
– DB / – WB
1.  OPERATING RANGE
Maximum
Minimum
Maximum
Minimum115 °F DB
0 °F DB
75 °F DB / 65 °F WB
– DB / 0 °F WB Temperature Indoor Air Intake Temp. Outdoor Air Intake Temp.
Cooling
Heating
6 

2.  SPECIFICATIONS
2-1.  Unit Specifications
Indoor UnitCS-KE12NB41 & CZ-18BT1U
Outdoor UnitCU-KE12NK12-1-1.
Vertical
dB-A
dB-A Indoor : Hi/Me/Lo
Outdoor : Hi Air Filter
Compressor
Refrigerant / Amount charged at shipment Ibs (g)
Refrigerant Control12.6
1,260( 2.5 to 12.6 )
( 250 to 1,260 ) 11,900
3.5( 3,000 to 11,900 )
( 0.9 to 3.5 )Cooling
7,200
4,700
115V Single-Phase 60Hz
104 to 126
Refrigerant Tubing  Connections Operation Sound
Electrical Rating
Sensible Capacity
Latent Capacity
W Power InputV
A...

Indoor UnitCS-KE12NB41 & CZ-18BT1U
Outdoor UnitCU-KE12NK1
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
Remarks:Rating conditions are:
Cooling: Indoor air temperature 80 °F DB / 67 °F WB
Outdoor air temperature 95 °F DB / 75 °F WBHeating: Indoor air temperature 70 °F DB
Outdoor air temperature 47 °F DB / 43 °F WB
Shipping VolumeNet
Shipping Weight Ib. (kg)
Ib. (kg)
cu.ft (m3) inch (mm) Dimensions & Weight (Indoor Unit)
Unit Dimensions Height
Width
Depth
-
-22-5/8 (575)
35.3 (16)Individual Unit
Body...

< 230V > Indoor UnitCS-KE18NB4UW & CZ-18BT1U
Outdoor UnitCU-KE18NKU
2-1-2.
Vertical
dB-A
dB-A Indoor : Hi/Me/Lo
Outdoor : Hi Air Filter
Compressor
Refrigerant / Amount charged at shipment Ibs (g)
Refrigerant Control8.3
1,860( 1.2 to 8.3 )
( 250 to 1,860 ) 17,500
5.15( 4,000 to 17,500 )
( 1.2 to 5.15 )Cooling
10,600
6,900230V Single-Phase 60Hz
187 to 253
Refrigerant Tubing  Connections Operation Sound
Electrical Rating
Sensible Capacity
Latent Capacity
W Power InputV
A Available Voltage  Range
Running...

Indoor UnitCS-KE18NB4UW & CZ-18BT1U
Outdoor UnitCU-KE18NKU
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
Shipping VolumeNet
Shipping Weight Ib. (kg)
Ib. (kg)
cu.ft (m3) inch (mm) Dimensions & Weight (Indoor Unit)
Unit Dimensions Height
Width
DepthIndividual Unit
Body
(CS-KE18NB4UW)
Panel
(CZ-18BT1U) Indoor Unit(CS-KE18NB4UW & CZ-18BT1U)
inch (mm)
inch (mm)
inch (mm) Package Dimensions Height
Width
Depthinch (mm)
inch (mm)
Shipping VolumeNet
Shipping Weight Ib. (kg)
Ib. (kg)
cu.ft (m3) inch (mm) Dimensions &...